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"For more than 137 years the Quarzwerke Group has been well known and valued as a producer of mineral raw materials—a tradition of which we are proud. We are an independent family company that has always combined high-grade raw material resources with modern and efficient processing technology. Always in step with the times and with a sustainable, ecological aspiration.

Our activities are focused on the extraction, processing and refining of industrial minerals. In particular quartz, kaolin, feldspar, wollastonite and mica are processed into more than 700 different quality products and sold in 50 countries.

Every day we are glad that our raw materials are making a valuable contribution in numerous areas of application. We see ourselves as efficient and reliable partners with a social and ecological responsibility."

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SEPASIL® is for industrial use, mighty, workable silica sand deposits are of decisive importance. Nevertheless, chemical purity and constancy are not enough in order to apply silica directly as a raw material. In Quarzwerke plants silica sands are thoroughly prepared. The raw material has to pass exten-sive cleaning-, classification-, drying- and iron-free grinding processes in order to produce silica sands, flours and powders. For the production of silica flours and -powders with a defined grain size distribution separation processes are required in addition to iron-free grinding. Quarzwerke are able to produce silica powders with grain sizes down to 1 μm due to a fine-tuned combination of grind- and classification technology. Another refining step is the surface-treatment with silanes or silan-based substances which can be adjusted to the respective application.

SEPASIL

SIKRON® is for industrial use, mighty, workable silica sand deposits are of decisive importance. Nevertheless, chemical purity and constancy are not enough in order to apply silica directly as a raw material. In Quarzwerke plants silica sands are thoroughly prepared. The raw material has to pass exten-sive cleaning-, classification-, drying- and iron-free grinding processes in order to produce silica sands, flours and powders. For the production of silica flours and -powders with a defined grain size distribution separation processes are required in addition to iron-free grinding. Quarzwerke are able to produce silica powders with grain sizes down to 1 μm due to a fine-tuned combination of grind- and classification technology. Another refining step is the surface-treatment with silanes or silan-based substances which can be adjusted to the respective application.

SIKRON

MILLISIL® is for industrial use, mighty, workable silica sand deposits are of decisive importance. Nevertheless, chemical purity and constancy are not enough in order to apply silica directly as a raw material. In Quarzwerke plants silica sands are thoroughly prepared. The raw material has to pass exten-sive cleaning-, classification-, drying- and iron-free grinding processes in order to produce silica sands, flours and powders. For the production of silica flours and -powders with a defined grain size distribution separation processes are required in addition to iron-free grinding. Quarzwerke are able to produce silica powders with grain sizes down to 1 μm due to a fine-tuned combination of grind- and classification technology. Another refining step is the surface-treatment with silanes or silan-based substances which can be adjusted to the respective application.

MILLISIL

Fused silica products of the product range BRUCAFIL® are particularly suitable for the production of electronic parts and components, when low viscosities, optimised grain size distributions and adapted grain forms play an important role.

BRUCAFIL

SILBOND® is for industrial use, mighty, workable silica sand deposits are of decisive importance. Nevertheless, chemical purity and constancy are not enough in order to apply silica directly as a raw material. In Quarzwerke plants silica sands are thoroughly prepared. The raw material has to pass exten-sive cleaning-, classification-, drying- and iron-free grinding processes in order to produce silica sands, flours and powders. For the production of silica flours and -powders with a defined grain size distribution separation processes are required in addition to iron-free grinding. Quarzwerke are able to produce silica powders with grain sizes down to 1 μm due to a fine-tuned combination of grind- and classification technology. Another refining step is the surface-treatment with silanes or silan-based substances which can be adjusted to the respective application.

SILBOND

AMOSIL® is a fused silica which is the amorphous modification of high purity silica. It is artificially produced using an electric arc at 2,000°C. The main feature of fused silica is an extremely low coefficient of thermal expansion (0.5*10-6/K). Therefore these products are particularly suitable for special applications with alternating temperature loading. Through special iron free grinding and subsequent air separation we are able to offer grain size distributions down to submicrons. In addition to our standard products we offer a special grain size optimised grade as well.

AMOSIL

SILMIKRON® is for industrial use, mighty, workable silica sand deposits are of decisive importance. Nevertheless, chemical purity and constancy are not enough in order to apply silica directly as a raw material. In Quarzwerke plants silica sands are thoroughly prepared. The raw material has to pass exten-sive cleaning-, classification-, drying- and iron-free grinding processes in order to produce silica sands, flours and powders. For the production of silica flours and -powders with a defined grain size distribution separation processes are required in addition to iron-free grinding. Quarzwerke are able to produce silica powders with grain sizes down to 1 μm due to a fine-tuned combination of grind- and classification technology. Another refining step is the surface-treatment with silanes or silan-based substances which can be adjusted to the respective application.

SILMIKRON

AMOSIL® is a fused silica which is the amorphous modification of high purity silica. It is artificially produced using an electric arc at 2,000°C. The main feature of fused silica is an extremely low coefficient of thermal expansion (0.5*10-6/K). Therefore these products are particularly suitable for special applications with alternating temperature loading. Through special iron free grinding and subsequent air separation we are able to offer grain size distributions down to submicrons. In addition to our standard products we offer a special grain size optimized grade as well.

AMOSIL®

SILBOND®

Quarzwerke MinMix fillers are made from high-quality industrially washed and processed raw materials. They are homogeneous special mixtures for the production of reaction resin bonded filling compounds. Thanks to the optimized combination of grain fractions based on different raw materials and additives they offer excellent processing properties. Simultaneously the binder quantity is reduced. The maximum filling degree and the curing time depend on the used resin system. Depending on the layer thickness of the product, whether smooth pigmented or sprinkled with colored silica, the resin-filler-ratio can be adjusted at 1:2 to approx. 1:3.

Quarzwerke MinMix

SIKRON®

SILMIKRON®

SEPASIL® EK

MILLISIL®

Fused silica products of the product range BRUCAFIL® are particularly suitable for the production of electronic parts and components, when low viscosities, optimized grain size distributions and adapted grain forms play an important role.

BRUCAFIL®

Weisser Quarz (White silica) is silica which has slightly been calcined. The silica core is covered by a cristobalite shell. For this reason White silica has the stability of silica but also the high whiteness of cristobalite. Furthermore the grain surface is only slightly chapped

Quarzwerke Weisser Quarz

Quarzwerke

"For more than 137 years the Quarzwerke Group has been well known and valued as a producer of mineral raw materials—a tradition of which we are proud. We are an independent family company that has alw

Quarzwerke - Industrial minerals - Quartz - Kaolin - Feldspar

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